Multiplayer - Unity3D Pro and Android Pro

Good afternoon developers.
I have Unity3D Pro and Android Pro, could some one please tell me how to connect two android devices with bluetooth or wifi, and let them play together?
Please, give me a complete guide, because I don’t know anythink of Multiplayer or Networking.
Thanks have a nice week end.
Good bye!

Hey devs, I want to ask you a thing.
I know, to use keyboard on Android we need to use Iphone Keyboard, right?
So this guide teach me how to create multiplayer on iOS Devices, Could this also work on Android?
Thanks good bye!